I started on a 550 about 5 years ago. I like it. Different tool heads, conversion kits, dies etc will cost you. I have a different tool head for every caliber but switch 1 powder measure for all pistol and one for.all rifle. Still have to adjust but not as much. You could get started with one caliber and build off from there. Watch for used stuff to get cost down. You don't need dillion everything either. I use mostly Lee dies and they work well. Most reloading manual have literature you should read, that said I gained enough info from the Lyman and hornady books I had given to me to read thru that I felt comfortable starting. I also watched a lot of YouTube vids on handloadimg. Good luck, shop for components, buy bulk to save. It's kind of slim pickins on some stuff now but its there